So what have you guys replaced this stuff with? (sound deadening)

That add looks perfect Rick, however I wonder if I should bite the bullet and use dynamat or is the extra expense just a waste of money....hmmm

EDIT: I went down to Dandenong today and it was a seedy little run down place which suprised me from the website. They did not do half of the deadening on their website and only sold a non adhesive pink felt mat with a layer of bitumen sandwhiched in the middle.